Pulley manipulator



Patented Aug. 5, 1924. i i 195 DANIEL n. TANNER, or `LA GRANDE, oRGoN.

PULLEY MANIPULATOR.

Appncjation sied` December 2s, 1921. serial No. 525,354.

To (/,ZZw/'wmz'tmay conce/Mt.' center, which on this "class of arbor isa Be it known that I, DANIEL R. TANNER, female center.. In this improvedconstruca citizen of the United States, residing at tion, the thrust forwithdrawing the pulley, La Grande, in the county of Union and whileimposed longitudinally of the shaft, 5

5 State of Oregon, have invented certain new is sustainedthereby in sucha manner that and useful Improvements in Pulley fManipu-f the femaleshaft center is not only protectlators, of which the following isaspeciied from injury, but alsoin such manner cation. that the metal ofthe pulley `is not in any This invention relates to improvements in waydisturbed, hence the bore of the latter 60 means for withdrawing apulley from its is always true to the periphery. Further,

` shaft and later restoring the `pulley to its by retaining the femalecenter intact, the

working position onto said shaft. shaft can be turned down true in alathe The device of my invention is particuwhen jmounted on the malecenters of the larly adapted for withdrawingor eXtractlatter. 65

ing pulleys mounted upon conical arbors or lThe type ofpulley for whichthis invenshafts, such as in wood planing-machines tion is designed, isa web pulley, and differwhere keys and sets screws are not ementmanufacturers notonly make the web ployed. In this manner of mounting orof different thickness but they also locate fixing a pulley, anchorageis effected by reathe web at different distances from the outer 70 l sonof the very tight frictional engagement end of the pulley. Therefore, tomake the of the conical bore of the pull-ey with the device of myinvention universally applicaconical arbor. Means such as a nut'onthe`ble to all makes of pulleys, I provide adend of the arbor,.is employedfor normally justable means whereby the wrench portion retaining thepulley in a fixed position on of my Ainvention mayY be readily advanced75 the arbor. By reason of the very firm and to sucha position that itcan coact with secure anchorage of the pulley,- it is a very the nutirrespective of the location of the diicult and laborious eEort toremove the nut from the outer end of the pulley. pulley, which removalmay frequently be In the most improved form of my innecessary. v `Ivention, this adjustment means performs an so Now it is the primaryobjectof this inadditional function which consists in acting vention toprovide a device whereby this as an interposed abutment for transmittingkind of anchored pulley may be very quickly the turning off thrust fromthe nut to the and easily removed without in any way in'- mechanismwhich grips the pulley. juring the flanges of the latter. In the Myinvention also includes a novel form 85 most improved embodiment, myinvention of'yoke mechanism for gripping the pulley includes mechanismfo'r tightly gripping the in such a manner as not to in any way inpulleyand means co-acting with said mecha- 4jure the flanges, or any part ofthe pulley, nism and uponthe shaft for' loosening the and in thepreferred construction, said pulley. mechanism .grips the pulleyendwis'e of the 90 40 In the preferred construction, Wrench latter andin such a manner as mainly to means is employed for action upon the nutimplnge against the annular heel portions by means of which thepulley isnormally ofthe pulley flanges. y retained in position, such actionbeing. a' 'The said yoke mechanism is somewhat enturning off movement ofthe nut with means larged with respect to the maximum dia- 95 fortransmitting the resultant thrust to the nietrical 130111011 0"C1 1ePUHGY'SO HS t0 take pulley in such a manner that the latter willpulleysof different sizes, and an important be loosened as the nutis turnedoff. and useful function performed by the @ne of the most importantfeatures of this wrench device is' that when it 'engages the inventionresides in the means for with'drawnut, it Serves to center the pulleywith re- 100 ing a pulley `without in any way disruptspect to the yokemechanism.

ing or altering what is called the shaft- III addl'lOD 'CO IOOSenlng andwithdrawing a pulley from a conical arbor, the device of my inventionalso functions as a wrench l of Figure 4.

Figure 2, is a view in elevation looking from the left of Figure 1.

Figure 3, is a bottom plan view looking from the lower end of Figure 2,with the hand bar omitted.

Figure 4, is a sectional view on line 4-4 of Fig. 1.

Figure 5, is a sectional view on line 5-5 of Fig. 4.

Figure 6, is a sectional view of a pulley showing the mark of driftoccurring in the old method of removing a pulley.

Figure 7, illustrates in exaggerated form the cross sectional appearanceof a pulley after having been removed in the old way, and illustratinghow it appears when applied to the shaft with the nut turned home.

Like characters of reference designate similar parts throughout thedifferent figures of the drawings.

As illustrated, 1 designates a web pulley l' having a belt flange 2, atits inner end and a like flange 3, at its outer end. The pulley has aweb 4 provided with a conical bore 5.

I It will be noted that the web 4 is nearer to the inner than the outerend of the pulley, and different manufacturers locate the web atdifferent distances. This statement will be more clearly informativeduring a later description of a certain novel portion of the device. Anarbor or shaft 6 has a conical or tapered end 7 onto which the pulleybore 5 isdesignedto tightly fit. The tapered end 7 terminates in areduced threaded end 8. A nut 9 is turned onto the threaded end 8 andimpinges against the web 4, or rather its outer face, to normally holdthe pulley in position on its shaft. However, the nut additionallyfunctions as a tightener for the pulley since this nut, when turnedhome, serves to securely telescope the pulley bore into a frictionallyand absolutely non-rotative position onto its shaft. The foregoingpulley andshaft construction is old and well known but it may be pointedout that great difficulty is encountered in removing this type ofpulley, or any type of pulley, from a conical shaft. Wedging andVhammering against the inner end of the pulley is very likely to injurethe latter but heretofore no other means, to my knowledge, has beenemployed. A further objection to the old. eX-

pedient is the fact that it is time consuming and thereby keeps themachine idle for an unnecessary period.

I will now describe that part of the disclosure which constitutes thedevice of my invention, reference first being made to my improved frameor yoke mechanism for application to the pulley to be clamped thereonwhile the pulley is still tight on the shaft.

My improved yoke comprises a bight portion 10, adapted to rest againstthe outer flange 3, of the pulley. Said bight has a centrally disposedenlargement 11, for a purpose which will later appear. Limbs `12 and 13extend from the bight 10 lengthwise or alongside of the periphery of thepulley and slightly beyond the inner flange 2. LimbA 12 is bifurcatedand the forked ends 14 thereof are provided with openings 15. Similarly,limb 13 is forked at 16 and is provided with openings'17. The inner ends18 and 19 of the openings 15 and 17, respectively, are somewhat inclinedto form wedge or clamping elements. A clamping or wedge member isprovided which is preferably U- shaped, the bight thereof beingindicated at 20, and the limbs at 21. The limbs 21 are provided withpairs of inclined or wedge portions 22 and 23 for respective engage-`ment with the inclined portions 18 and 19 so that when the U-shapedclamping bar is forced to the left of Figure 4, the outer edge 24 willtightly impinge against the annular heel 25 of the inner flange 2. Thelimbs 21 are slightly curved or cut away at 26 and 27 so as not toengage the peripheral outer portions of the flange 2. Thus by thisconstruction the wedge bar cannot injure the outer portionsof theflange. It will now be clear that when thewedge bar is driven tightlyinto position, the pulley will be securely anchored in the yokemechanism" between the bight 10 and the limbs 21. By making the clampingbar U-shaped, I am enabled to locate the limbs 22 in spaced relationthereby impinging the pulley at points laterally of the center thereofthereby obtaining a firmer anchorage and avoiding interference with theshaft. i

Reference will next be made to the wrench means which coacts with thenut. 9 and frame mechanism to loosen the pulley.

A wrench spindle 28 extends through and is rotatable in enlargement 11,of the bight 10, and is provided with a shoulder 29. The spindle 28terminates in a wrench socket 30 having a bore shaped to exteriorlytelescope nut 9. The spindle is provided with a socket bore 31 forpreventing any injury to the shaft center of arbor 7. A handle bar 32 isfitted upon the polygonal end 33 of spindle 28 to permit the operator toturn said spindle.V

l will next describe the novel means whereby the wrench socket may beadvanced into engagement with the nutirrespective of the 1' ,adidasdistance between the enter face of the web and the outer end of thepulley, and l will also describe the marmer in which said meansfunctions toY transmit the turning off thrust from the nut to the yokemechanism.

`An adjusting sleeve y 34 is provided with aj smooth cylindrical boretelescoping the spindle 28 with a yslight working 4clearance and havingits inner end` engaging shoulder 29. Sleeve 84 is exteriorly threaded at35 to engage corresponding threads "36 in a like boire in enlargment11.V A locknut 37 having a projection 38, to facilitate itsmanipulation, is turned onto the sleeve 84and is adapted to engage thebight 10 when in a locking position.

It will now be clear that when the spindle 28 is rotated to turn offn`utr9, that the thrust on `spindle 28 will be outwardly, as indicatedby the arrow in Figure 4.` This outward thrust is transmitted from theshoulder 29 to the sleeve 34, and from the latter to the bight 10` ofthe frame mecha-` nism. Thus as the nut' 9 is loosened, the framemechanism will correspondingly loosen the pulley endwise off from itsconical arbor. After the pulley has been moved off to such an extent asto become loose, then the entire apparatus, as shown in Figure 4, can bemanually pulled outwardly to completely remove the pulley from thearbor, after the nut 9 has been completely turned off fromthe threadedend 8. i

lt will now be clear that when the socket 30 is engaged with the nut 9,the frame mechanism will be centered on the pulley.

ln practice, ythe device is centered `on the pulleywith the socket `30engaging the nut 9 before the clamping bar is inserted in the yokeopenings. Any adjustmentv of the sleeve 34 may be readily effected afterthe device is in position as shown inFigiire 4. Usually, the pulleys ofall the planers of a single mill will be `of the saine. size and no adjustmentotlrer than the initial adjust` ment will have to be made. .Thedotted lines in Figure 4, illustrate Athe vposition of the parts duringloosening action. 1

lt will now be clear how the *wrenchV )por-i tion may be employed totighten the pulley onto the shaft, `it merely being necessary to turnthe nut home on the end 8, in .which operation the frame. does 'notnecessarily function, as it may be entirelyy omit-ted vin the restoring`operation. In other words, after the pulley has been removed, the framecan be detached therefrom.` fBy merely removing the handle bar, thespindle 28 may be slipped out of the sleeve 34.. Then after the pulleyhas been again mounted on the conical arbor, the socket 30 may beapplied to the nut and the handle bar32` applied to the spindle 38,whereupon the pulley may be tightened by turning the nut 9 to a finalposition,

ltV will now be clear that while l exert pressure on the shaft to removethe pulley, still, such pressure is exerted circumferential'ly of theshaft center thereby protecting. the latter from any injury. ln thepresent form of the invention; this is accomplished by imposing thethrust directly and only on4 the nut 9. Furthermore, the thrust isapplied symmetrically of the pulley so that in withdrawing the same thebore of the pulley cannot be forced out of true.

The foregoing will be more graphically understood by reference toFigures 6 and 7, which show the results of the old method of removingthe pulley. In Figure 6, 39 designates the mark of drift of the metaldue to hammering thrust in removing the same. Tt will seem that themetal is upset at 40 thereby getting the bore of the pulley out of truewith the periphery. Figure 7 illustrates, in slightly exaggerated formthe cross-sectional appearance of the pulley after the nut has beenturned home. Note the space 41 which is the direct result of the bore ofthe pulley getting out of true, or in other words getting outconcentricity with the periphery of the pulley. ln a high speed machinelike a wood-planer, the result of vibration from a pulley in thiscondition would be disastrous. Therefore it will now be clear that lhave provided means to avoid this defective action, and the avoidance isdue to the fact that the stress on the pulley is applied symmetrically,and also to the fact that the stress on the shaft is not only appliedconcentrically about the shaft center to avoid injury thereto, but alsoto the fact that the stress on the shaft is imposed in exact alinementwith the longitudinal raxis of the shaft.

lt is believed that my invention will be fully understood from theforegoing description, and while l have shown one specific embodiment, ldo not wish to be limited thereto except for such limitations as theclaims may import.

l claim:

1. As a means of withdrawing a pulley endwise olf from its shaft with anut on said shaft for normally retaining the pulley on said shaft, ayoke frame for engaging the pulley, and means for turning olf said nutand engaging said frame whereby as the nut is turned off said frame willwithdraw said pulley. i i

2. As a means of withdrawing a ijiulley endwise off from its shaft witha nut on said shaft for normally retaining said pulley on said shaft, ayoke frame for engaging the pulley. and means having shouldered andswivelled engagement with said frame for turning off said nut andwithdrawing said pulleyas said nut is turned off. Y

3. As a means of withdrawing a pulley endwise ofi from its shaft with anut 0n el i said shaft for normally retaining said pulley on said shaft,a yoke frame engaging said pulley, and means for turning off said nutand having shouldered engagement with said nut and frame whereby saidpulley will be withdrawn as said nut is tuined off.

il. As a means of withdrawinga pulley endwise 0H from its shaft with anut on said shaft for normally retaining said pulley on said shaft, ayoke having its bight adapted to engage the outer end of said pulley andits limbs extending'alongside said pulley and past the inner end thereofand having openings, a clamping bar eX- tending through said openingsand engaging the inner end of said pulley to tightly grip the yoke ontosaid pulley, and means swivelled and shouldered in the bight of saidyoke for turning off said nut and withdrawing said pulley as said nut isturned.

5. As a means of withdrawing a pulley eiidwise off from its shaft, ayoke having its bight adapted to engage the outer end of the pulley andits limbs extending alongside said pulley and past the inner endthereof' and having openings therein, a clamping bar' extending throughsaid openings and having its pulley engaging face curved to restrictengagement of said bar with only the heel portions of said pulley tothereby protect the flange thereof, and means coact ing with the biglitof said yoke for exerting thrust endwise of said shaft to withdraw saidpulley. h l

6. As a means of withdrawing' a pulley endwise olf from its shaft, ayoke having its tions for wedge engagement vwith the in` Vclindedportions of said openings to wedge clamp said yoke onto said pulley, andmeans coactiiig with the bight of said yoke for exerting thrust eiidwiseof said shaft to withdraw said pulley.

'l'. As a means of withdrawing a pulley endwise olf from its shaft, aframe mechanism for attachment to the pulley, and said mechanism havingmeans coacting with thel shaft for centering said mechanism on saidpulley and adapted to exert pressure on said shaft to withdraw saidpulley.

8. As means of withdrawing a web pulley from its shaft with a nut onsaid shaft normally engaging the pulley web to retain the pulley on theshaft, a frame mechanism adapted to grip the pulley, means coacting withsaid mechanism for turning olf the nut and withdrawing the pulley, andadevice adn justable on said mechanism to advance said means intoengagement with said'nut irrespective ofthe location of the web withrespect to the outer end of the pulley.

9. As a means of withdrawing a web pulley from its shaft with a nut onsaid` shaft fornorinally engaging said web to retain said pulley on saidshaft, mechanism adapted to grip the pulley and having means forlturning olf the nut, and a device adjustable on said mechanism foradvancing said means into engagement with the nut irrespective of thelocation of said web with respect to the outer end of the pulley andtransmitting turning off thrust from said nut to said mechanism towithdraw said pulley.

10. As a means of withdrawing a web pulley from its shaft with a` nut onsaid Vshaft engaging the web to normally hold s aidV pulley on saidshaft, a frame mechanism adapted to grip said pulley, a wrench spindleturnable in said mechanism and having a wrench portion for engagementwith said nut to turn olf the latter, an adjusting sleeve exteriorlytelescoping said spindle and having shouldered engagement therewith andhaving threaded engagement with said mechanism to advance vthe wrenchportion into engagement with said nut irrespective of the location ofthe web with respect to the outer end of the pulley and said sleevetransmitting turning o thrust to said mechanism tg withdraw said pulleyas said niitis turned o 1l. As a means of withdrawing a web pulley fromits shaft with a nut 0n said shaft engaging said web-to normally holdsaid pulley on said shaft, a frame mechanism adapted to grip saidpulley, a wrench spindle turnable in said mechanismand haviiigya wrenchportion for engagement with said nut to turn olf the latter, anadpistable sleeve exteriorly telescoping said spindle-and havV ingshouldered engagement therewith and having threaded engagement with saidmechanism to advance the wrench portion into engagement with said nutirrespective of the location of said web with respect to the outer endof the pulley and said sleeve transmitting turning offvthrust to saidmechanism to withdraw said pulley as said nut is turned olf, and a locknut threaded on said sleeve and engaging said mechanism.

12. As a means of withdrawing a web pulley from and restoring it onto ashaft having a nut for engagement with the web of the pulley, mechanismadapted to grip the pulley, and means coacting with the nut and saidmechanism to withdraw the pulley andV coacting with said nutto tightensaid pulley onto said shaft.

13. As a means of withdrawing a pulley from and later tightening itVonto its shaft, mechanism adapted to grip the pulley, and means coactingwith said mechanism and exerting a thrust on the shaft to withdraw thepulley or exerting a thrust on said shaft to tighten the pulley.

14. As a means of withdrawing a Web pulley endwise off from its shaftwith a nut on said shaft for engagement with the web to normally retainsaid pulley on Said shaft, a yoke having its bight engaging the outerend of the pulley and its limbs extending alongside said pulley and pastthe inner end thereof and terminating in pairs of openings, a U-shapedclamping bar having its limbs eX- tendingthrough said openings onopposite sides of said shaft and coacting with said limbs to tightlyclamp on said pulley, an adjusting sleeve threaded in the bight of saidyoke, a Wrench spindle journalled in said sleeve and having shoulderedengagement therewith and pro-vided with a socket for nism forsymmetrically gripping the pulley,

and wrench means adapted to act on the nut to unscrew the latter andcoacting with said mechanism to transmit the thrust thereto,

whereby the alined action of said mechanism l and means with the axis ofsaid arbor will prevent injury to the pulley bore and shaft center.

In testimony whereof I hereby aiiix my signature.

DANIEL R. TANNER.

